000265329 001__ 265329
000265329 005__ 20190619220216.0
000265329 0247_ $$2doi$$a10.1038/s41467-019-09590-3
000265329 037__ $$aARTICLE
000265329 245__ $$aMid infrared gas spectroscopy using efficient fiber laser driven photonic chip-based supercontinuum
000265329 260__ $$c2019-04-04
000265329 269__ $$a2019-04-04
000265329 336__ $$aJournal Articles
000265329 520__ $$aDirectly accessing the middle infrared, the molecular functional group spectral region, via supercontinuum generation processes based on turn-key fiber lasers offers the undeniable advantage of simplicity and robustness. Recently, the assessment of the coherence of the mid-IR dispersive wave in silicon nitride (Si3N4) waveguides, pumped at telecom wavelength, established an important first step towards mid-IR frequency comb generation based on such compact systems. Yet, the spectral reach and efficiency still fall short for practical implementation. Here, we experimentally demonstrate that large cross-section Si3N4 waveguides pumped with 2 μm fs-fiber laser can reach the important spectroscopic spectral region in the 3–4 μm range, with up to 35% power conversion and milliwatt-level output powers. As a proof of principle, we use this source for detection of C2H2 by absorption spectroscopy. Such result makes these sources suitable candidate for compact, chip-integrated spectroscopic and sensing applications.
000265329 542__ $$fCC BY
000265329 6531_ $$aFrequency combs, Integrated optics, Mid-infrared photonics, Supercontinuum generation, Mid-IR spectroscopy
000265329 700__ $$g254031$$aGrassani, Davide$$0248826
000265329 700__ $$g271070$$aTagkoudi, Eirini$$0250626
000265329 700__ $$g253712$$aGuo, Hairun$$0248824
000265329 700__ $$aHerkommer, Clemens
000265329 700__ $$g283937$$aYang, Fan$$0251016
000265329 700__ $$0244694$$aKippenberg, Tobias$$g182444
000265329 700__ $$0245937$$aBrès, Camille Sophie$$g210231
000265329 773__ $$q1553$$j10$$tNature Communications
000265329 8560_ $$fluc.thevenaz@epfl.ch
000265329 8564_ $$uhttps://infoscience.epfl.ch/record/265329/files/Mid%20infrared%20gas%20spectroscopy%20using%20efficient%20fiber%20laser%20driven%20photonic%20chip-based%20supercontinuum.pdf$$zFinal$$s1462394
000265329 909C0 $$mcamille.bres@epfl.ch$$zMarselli, Béatrice$$xU12394$$pPHOSL$$0252400
000265329 909C0 $$mmohammad.bereyhi@epfl.ch$$zPasquier, Simon$$xU11892$$yApproved$$0252348$$pLPQM
000265329 909C0 $$yApproved$$pSCI-STI-LT$$xU12146$$mzhisheng.yang@epfl.ch$$zMarselli, Béatrice$$0252591
000265329 909CO $$pSB$$pSTI$$particle$$ooai:infoscience.epfl.ch:265329
000265329 960__ $$aeirini.tagkoudi@epfl.ch
000265329 961__ $$afantin.reichler@epfl.ch
000265329 973__ $$aEPFL$$sPUBLISHED$$rREVIEWED
000265329 980__ $$aARTICLE
000265329 981__ $$aoverwrite